Hope you're all happy now!

[IdahoMtnSpyder]

Just for grins and giggles here are a few questions I've thought up related to tire pressure.

What is the best trade off between ease of turning by running higher pressure, and tire traction with wheels turned all the way right or left? And how does forward speed factor in?

What is the effect on wear from average speed? Will a Spyder driven at an average of 40 mph get the same, or maybe 1 1/2 times greater, tread life as one driven at an average of 70 mph?

What is the effect of road surface? How much more tread life will you get if you drive only on smooth concrete freeways versus always driving on fresh chip sealed roads?

How much does driving around curves vs. straight roads affect tread life? See this comment: http://www.spyderlovers.com/forums/...-Opservation&p=1387820&viewfull=1#post1387820

The charts in the document linked to here, http://www.spyderlovers.com/forums/...-Opservation&p=1387903&viewfull=1#post1387903, show a somewhat straight line relationship between load and tire pressure. But does the straight line hold at loads less than what are shown on the chart, which is the case for Spyders, or does it curve? If it curves, then which way, up or down?

For a given Spyder weight does a larger patch contact area with a lower coefficient of friction provide more traction than a smaller contact patch with a higher coefficient of friction?

How does the stiffness of the tread and sidewall affect what pressure gives the smoothest ride? What is the effect on tread wear, both overall and across the tire?

Real reliable answers to most of these can only be derived by systematic controlled testing. Testing that would involve at a minimum dozens of vehicles and dozens of tires at almost innumerable variations of load and tire pressure. The value of the answers won't come close to the cost of obtaining them. Hence, we are stuck with relying on dozens of individual experiences, experiences that vary widely, to come to our own individual conclusions.

 

[UtahPete]

Hey aren't you hijacking your own thread now?

 

[BLUEKNIGHT911]

CAR TIRE PRESSURE - How it's derived !!!

Read your last post above and I can say with some authority that 95% of it could be figured out and then posted here .... However there are Two major problems with this #1. - 99.999 % of the members would not even attempt to read the weeks or months needed to read all the DATA .......#2.- 98.999 % probably wouldn't understand it, this is very, very technical stuff ....... My thought process works more towards this example : Einstein said .... E=mc2 ..... I'll take His word on this as opposed to dedicating my life to verify it on my own...... There comes a time when it's wiser to just TRUST the source of the information. Ask yourself this ....Has there been ANY evidence/proof shown by anyone that PROVES ... that running higher than necessary tire pressures is better....... Mike :thumbup:

 

[johnsimion]

Tire sizes for 1936 automobiles are not all that different from autos today, but I'll bet the ideal inflation pressures have changed!

Well, actually you have that a bit backwards. About all tires then and today have in common is that they're all made out of rubber, hold air and roll down the highway. Today we have big, wide steel-belted tubeless run-flat radials in a 35 section and sticky tread rated to 120 mph and over a "g" in cornering force. My 1930 Ford Model A had skinny little Maypop tires {4.75 x 19} made with bias plies and tubes. However, inflation pressures aren't much different. The recommended inflation pressure for a 1930 Ford Model A was 35 psi per the Model A Restorers' Club, exactly same as my wife's SUV and my son's car, and actually a couple of pounds less than my own car.

Other than that your post is well taken. :2thumbs:

 

[fjray]

Read your last post above and I can say with some authority that 95% of it could be figured out and then posted here .... However there are Two major problems with this #1. - 99.999 % of the members would not even attempt to read the weeks or months needed to read all the DATA .......#2.- 98.999 % probably wouldn't understand it, this is very, very technical stuff ....... My thought process works more towards this example : Einstein said .... E=mc2 ..... I'll take His word on this as opposed to dedicating my life to verify it on my own...... There comes a time when it's wiser to just TRUST the source of the information. Ask yourself this ....Has there been ANY evidence/proof shown by anyone that PROVES ... that running higher than necessary tire pressures is better....... Mike :thumbup:

Not trying to be a pain here but you're saying that we couldn't understand the data if it were made available. Why not make it available and see if we can understand it???

I believe in Trust but VERIFY. I don't believe in running higher than necessary pressures nor do I believe that low pressures are the answer either. I have only asked for information that shows how much pressure is necessary for a given load. So it seems what we need is the source for this info. I've been looking and haven't found anything other than the information on the side of a tire that gives max load at rated pressure . That's why I ran higher pressures in my rear tire because it was carrying a load close to 80% of the side wall rating.I'll keep looking and report.

 

[spyder-bite]

Had to tell some one

I just bought 2018 f-3 spyder pick it up from service at 9:30 am.:clap:

 

[IdahoMtnSpyder]

Well, actually you have that a bit backwards. About all tires then and today have in common is that they're all made out of rubber, hold air and roll down the highway. Today we have big, wide steel-belted tubeless run-flat radials in a 35 section and sticky tread rated to 120 mph and over a "g" in cornering force. My 1930 Ford Model A had skinny little Maypop tires {4.75 x 19} made with bias plies and tubes. However, inflation pressures aren't much different. The recommended inflation pressure for a 1930 Ford Model A was 35 psi per the Model A Restorers' Club, exactly same as my wife's SUV and my son's car, and actually a couple of pounds less than my own car.

Other than that your post is well taken. :2thumbs:

You're right! But expert knowledge has changed, nevertheless! The knowledge of rubber is altogether different today than even 60 years ago. I remember my older brother bragging about how he got 16,000 miles out his Goodyear Double Eagles on his '56 Chevrolet!

 

[IdahoMtnSpyder]

Hey aren't you hijacking your own thread now?

Weeeelllllll, I guess kind of!!!!!!!!!!!!!

 

[SpyderAnn01]

I just bought 2018 f-3 spyder pick it up from service at 9:30 am.:clap:

That’s awesome!

 

[malibu_dan]

I just bought 2018 f-3 spyder pick it up from service at 9:30 am.:clap:

Awesome sauce! That's great!


...what tire pressure you going to run? :gaah::yikes::gaah::yikes::gaah:

 

[tehrlich]

LOLOLOLOL!

Are you all happy that the topic is coming full circle? Right back into the trap of discussing tire pressures, science, no science, who's smart, who's dumb.

This will die down for a short bit of time and then, BAM! Here we go again!

 

[tehrlich]

Read your last post above and I can say with some authority that 95% of it could be figured out and then posted here .... However there are Two major problems with this #1. - 99.999 % of the members would not even attempt to read the weeks or months needed to read all the DATA .......#2.- 98.999 % probably wouldn't understand it, this is very, very technical stuff ....... My thought process works more towards this example : Einstein said .... E=mc2 ..... I'll take His word on this as opposed to dedicating my life to verify it on my own...... There comes a time when it's wiser to just TRUST the source of the information. Ask yourself this ....Has there been ANY evidence/proof shown by anyone that PROVES ... that running higher than necessary tire pressures is better....... Mike :thumbup:

You just can't help yourself, and you don't even recognize it.

At least I recognized and apologized to the people that did not agree with my assertions and verbiage. There is no way I'm leaving this forum. Learned too much and have met too many very friendly people. Plus, someone has to see my Spyder Milky Way pictures!

I do love your self aggrandizement to compare yourself to Einstein. That is awesome.

 

[BLUEKNIGHT911]

APOLOGIES

You just can't help yourself, and you don't even recognize it.

At least I recognized and apologized to the people that did not agree with my assertions and verbiage. There is no way I'm leaving this forum. Learned too much and have met too many very friendly people. Plus, someone has to see my Spyder Milky Way pictures!

I do love your self aggrandizement to compare yourself to Einstein. That is awesome.

" Kathy Griffith " apologized also ..... that wasn't believable either.............. I didn't compare myself to Einstein.... Todd perhaps you should read a post 3 or 4 times ..... BEFORE putting fingers on the keyboard. That would help dispel my belief that 1/2 the stuff you post in general and most of the stuff about me is just plain MADE-UP. ......your welcome .... Mike :thumbup: